EP1146246B1 - Piston de déroulage pour systèmes de ressort pneumatique - Google Patents

Piston de déroulage pour systèmes de ressort pneumatique Download PDF

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Publication number
EP1146246B1
EP1146246B1 EP01105502A EP01105502A EP1146246B1 EP 1146246 B1 EP1146246 B1 EP 1146246B1 EP 01105502 A EP01105502 A EP 01105502A EP 01105502 A EP01105502 A EP 01105502A EP 1146246 B1 EP1146246 B1 EP 1146246B1
Authority
EP
European Patent Office
Prior art keywords
piston
uncoiling
tube
aluminum
air spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01105502A
Other languages
German (de)
English (en)
Other versions
EP1146246A2 (fr
EP1146246A3 (fr
Inventor
Torsten Schulze
Franz Steimmel
Michael Optiz
Frank Wähner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hydro Aluminium Alutubes GmbH
Original Assignee
Hydro Aluminium Alutubes GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hydro Aluminium Alutubes GmbH filed Critical Hydro Aluminium Alutubes GmbH
Priority to SI200130639T priority Critical patent/SI1146246T1/sl
Publication of EP1146246A2 publication Critical patent/EP1146246A2/fr
Publication of EP1146246A3 publication Critical patent/EP1146246A3/fr
Application granted granted Critical
Publication of EP1146246B1 publication Critical patent/EP1146246B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
    • F16F9/04—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall
    • F16F9/05—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall the flexible wall being of the rolling diaphragm type
    • F16F9/057—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall the flexible wall being of the rolling diaphragm type characterised by the piston
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/40—Constructional features of dampers and/or springs
    • B60G2206/42—Springs
    • B60G2206/424—Plunger or top retainer construction for bellows or rolling lobe type air springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/70—Materials used in suspensions
    • B60G2206/71—Light weight materials
    • B60G2206/7102—Aluminium alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/81—Shaping
    • B60G2206/8104—Shaping by drawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/82—Joining
    • B60G2206/8201—Joining by welding

Definitions

  • the invention relates to a rolling piston for air spring systems according to the preamble of patent claim 1.
  • Air spring systems are used in particular in the automotive sector, z. B. for suspension in passenger cars or for suspension of the cabs in trucks.
  • the characteristic feature of air spring systems is that pressurized air is used as a spring element.
  • An important component of an air spring system is the rolling piston, on the outer surface of a rolling bellows rolls of rubber when the air spring system is claimed and performs a spring process.
  • the rolling piston positions or supports the rolling bellows without wrinkles.
  • the geometry of the rolling piston affects the spring characteristic of the air spring system, by selecting different diameter of the rolling piston.
  • the rolling piston When assembling an air spring system, the rolling piston is fitted in the system components, and for this reason there is a demand for high accuracy and minimum tolerances for the rolling piston. Also from the viewpoint that the rolling piston is exposed to constant pressure fluctuations by the suspension, the pressure fluctuations even by dynamically acting axial forces superimposed, high accuracy is required.
  • steel pipes are used, they are longitudinally welded and pulled.
  • steel tubes Although the requirements to be imposed on a rolling piston can be satisfactorily fulfilled, in particular with regard to their dynamic properties, it is disadvantageous, however, that the steel tubes have a relatively high weight.
  • the known aluminum rolling rolls are formed by extruded semi-finished products. Because of the rolling of the initially described reasons of the generally required accuracy, the known aluminum tubes must be pulled. When close rolling piston Manufacturing tolerances because of the seal against air leakage in the foreground, resulting in the mentioned high accuracy as a requirement, then this accuracy relates both to the compliance of the outer and the inner diameter and the wall thickness of the aluminum tube. Because of the tolerances in the range of a few hundredths of mm on the fitted component, due to sealing problems, but also by acoustic problems in the case of unpressed rolling piston, high demands are placed on the accuracy of the semi-finished product used.
  • German Patent Application DE 41 42 325 A1 describes a method for producing chassis carriers for vehicles, in particular passenger cars, made of aluminum alloys.
  • the starting point is the fact that in the cases in which the previous extruded aluminum tubes are processed into chassis parts of motor vehicles, a large number of forming steps is necessary, which includes the hydroforming or hydroforming process counts.
  • the known extruded aluminum pipes have the disadvantage that a hydroforming in previous other transformations is not possible because the forming capacity of the material is exhausted due to the previous transformations. Also, it is not possible to anneal before hydroforming because the material either cures at low annealing temperatures or, at higher annealing temperatures, becomes very soft and thus loses its strength without the possibility; to raise them again by further heat treatment.
  • the present invention is not concerned with the problem of allowing a variety of forming steps and to provide an intermediate annealing prior to hydroforming.
  • the invention has for its object to provide a rolling piston made of aluminum for air spring systems, which can be produced economically and inexpensively despite the required due to the dynamic properties accuracies and tight tolerances, so as to use the per se advantageous material aluminum even with rolling piston.
  • the invention provides to form the rolling piston by a longitudinally welded pipe, which consists of an aluminum alloy.
  • the design of the rolling piston in the form of a longitudinally welded aluminum tube is particularly advantageous.
  • the accuracies and tight tolerances achievable with longitudinally welded aluminum pipes must be mentioned, which can also be produced cost-effectively and economically in comparison to the previously known rolling-off pistons.
  • the tube is longitudinally welded without additional materials.
  • the aluminum alloy is formed by a natural-hard alloy.
  • the step of forming the rolling piston according to the invention as a longitudinally welded tube made of a hard aluminum alloy is to be regarded as a surprising measure, since it is known in the art that naturally hard aluminum alloys higher strength tend at temperatures above 60 ° C to corrosion. Such high temperatures are quite common in rolling piston. They are generated during operation by heat radiation from the engine, the transmission, the exhaust manifold and the brakes.
  • the weld of the tube has a seam superelevation between - 0.1 and + 0.1 mm.
  • high-frequency induction welding HFI welding
  • HFI welding high-frequency induction welding
  • This thickening of the weld which is referred to as a seam superelevation, is then within the specified tolerance range from - 0.1 and + 0.1 mm away, ie, in the area of the weld a thickening of + 0.1 mm is allowed, and on the other hand, it is still permissible if too much material is removed during the removal of the seam exaggeration and this results in a reduction of the wall thickness of the tube of 0.1 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vehicle Body Suspensions (AREA)
  • Fluid-Damping Devices (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Claims (8)

  1. Piston de déroulage pour systèmes de ressort pneumatique, dans lequel le piston de déroulage est formé comme un tuyau et est constitué d'aluminium, caractérisé en ce que le piston de déroulage est un tuyau soudé constitué d'un alliage d'aluminium.
  2. Piston de déroulage, conformément à la revendication 1, caractérisé en ce que le tuyau est soudé sans un matériau additif.
  3. Piston de déroulage, conformément à la revendication 1 ou 2, caractérisé en ce que l'alliage d'aluminium est constitué d'un alliage sans traitement thermique.
  4. Piston de déroulage, conformément à l'une des revendications 1 à 3, caractérisé en ce que l'épaisseur de paroi du tuyau est de 1,5 mm.
  5. Piston de déroulage, conformément à l'une des revendications 1 à 4, caractérisé en ce que le tuyau soudé est transformé moyennant des opérations de guidage et d'élargissement, dans la géométrie du piston de déroulage.
  6. Piston de déroulage, conformément à l'une des revendications 1 à 4, caractérisé en ce que le tuyau soudé est transformé moyennant des opérations de forgeage à chaud, dans la géométrie du piston de déroulage.
  7. Piston de déroulage, conformément à l'une des revendications 1 à 4, caractérisé en ce que le tuyau soudé est transformé moyennant des opérations de forgeage à chaud sous pression intérieure, dans la géométrie du piston de déroulage.
  8. Piston de déroulage, conformément à l'une des revendications 1 à 6, caractérisé en ce que la soudure du tuyau présente une surépaisseur de soudure située entre -0,1 et + 0,1 mm.
EP01105502A 2000-04-12 2001-03-05 Piston de déroulage pour systèmes de ressort pneumatique Expired - Lifetime EP1146246B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200130639T SI1146246T1 (sl) 2000-04-12 2001-03-05 Odvijalni bat za pnevmatsko vzmetne sisteme

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10018238 2000-04-12
DE10018238A DE10018238C1 (de) 2000-04-12 2000-04-12 Abrollkolben für Luftfedersysteme

Publications (3)

Publication Number Publication Date
EP1146246A2 EP1146246A2 (fr) 2001-10-17
EP1146246A3 EP1146246A3 (fr) 2003-06-25
EP1146246B1 true EP1146246B1 (fr) 2006-07-19

Family

ID=7638545

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01105502A Expired - Lifetime EP1146246B1 (fr) 2000-04-12 2001-03-05 Piston de déroulage pour systèmes de ressort pneumatique

Country Status (9)

Country Link
US (2) US20020036369A1 (fr)
EP (1) EP1146246B1 (fr)
AT (1) ATE333603T1 (fr)
CY (1) CY1105645T1 (fr)
DE (2) DE10018238C1 (fr)
DK (1) DK1146246T3 (fr)
ES (1) ES2269242T3 (fr)
PT (1) PT1146246E (fr)
SI (1) SI1146246T1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013203396C5 (de) 2013-02-28 2021-08-05 Ford Global Technologies, Llc Rollbalg-Luftfeder
DE102014108701A1 (de) 2014-06-20 2015-12-24 Radkersburger Metallwarenfabrik Gmbh Abrollkolben für eine Luftfeder

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* Cited by examiner, † Cited by third party
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US3552629A (en) 1969-07-07 1971-01-05 Bliss Co Method and machine for forming lap welded aluminum can bodies
US4000007A (en) 1973-02-13 1976-12-28 Cegedur Societe De Transformation De L'aluminium Pechiney Method of making drawn and hemmed aluminum sheet metal and articles made thereby
US4082578A (en) 1976-08-05 1978-04-04 Aluminum Company Of America Aluminum structural members for vehicles
US4324596A (en) 1980-10-29 1982-04-13 General Signal Corporation Method for substantially cold working nonheat-treatable aluminum alloys
US4527978A (en) 1984-02-13 1985-07-09 Dana Corporation Driveshaft
US4665294A (en) 1986-03-27 1987-05-12 Westinghouse Electric Corp. Method of welding aluminum alloys
JPH06503782A (ja) 1990-12-20 1994-04-28 アウディ アクチェンゲゼルシャフト 自動車ボディの構材結合、特に縦構材結合、およびアルミニウム構材の交換方法
DE4131323C2 (de) 1991-09-20 1995-05-24 Fichtel & Sachs Ag Schwingungsdämpfer für Kraftfahrzeuge
US5337997A (en) 1991-12-16 1994-08-16 Hockney Pty Ltd. Extruded aluminum spring hanger
DE4142325C2 (de) * 1991-12-20 1996-06-13 Bayerische Motoren Werke Ag Verfahren zum Herstellen von Fahrwerksträgern
GB9200622D0 (en) 1992-01-13 1992-03-11 Duley Walter W Improved means of co2 laser welding of a1 7075
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FR2707092B1 (fr) 1993-06-28 1995-08-25 Pechiney Rhenalu Produit métallurgique en alliage d'Al à durcissement structural présentant une variation continue des propriétés d'emploi suivant une direction donnée et un procédé et dispositif d'obtention de celui-ci.
DE4429992C2 (de) * 1993-11-03 1996-11-28 Fichtel & Sachs Ag Luftfeder
DE4402673A1 (de) 1994-01-29 1995-08-03 Huber & Bauer Gmbh Vorrichtung zum Innenhochdruckumformen
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Also Published As

Publication number Publication date
US7255334B2 (en) 2007-08-14
US20020036369A1 (en) 2002-03-28
DE10018238C1 (de) 2001-12-20
ES2269242T3 (es) 2007-04-01
ATE333603T1 (de) 2006-08-15
DE50110471D1 (de) 2006-08-31
EP1146246A2 (fr) 2001-10-17
DK1146246T3 (da) 2006-10-30
CY1105645T1 (el) 2010-12-22
US20030127782A1 (en) 2003-07-10
EP1146246A3 (fr) 2003-06-25
SI1146246T1 (sl) 2006-12-31
PT1146246E (pt) 2006-12-29

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